Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 770:
1950, Dr. Sun Yat-sen, blue surcharge $400 on $20 olive green, basic stamp is type I, horizontal pair, no gum as produced, NH, VF and scarce in pair, China Stamp Society certificate, C.v. $1,600 as singles, Est. $1,000-$1,200, Sc. # 43a
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